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A Computational Model for Progressive Cracking in Large Dams Due to the Swelling of Concrete by M. Cervera; J. Oliver; E. Herrero; E. Oñate is a Engineering article available to read on EtoBox.

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Ahatraet-The paper presents a computational model for the analysis of large concrete gravity dams subjected to severe damage due to internal actions. It has been observed in several operating concrete dams that the combined etTects of water intrusion and concrete expansion produce a time-advancing deteriorating process that may endanger the global stability of the construction. The present study was undertaken to simulate numerically the observed phenomena and to enable to predict future developments. Tensile cracking of the concrete is modelled using an elasticfracturing constitutive model. The model is able to simulate in a realistic manner the phenomena of primary and secondary crack initiation, elastic degradation, crack closing and reopening. The triggering of the volumetric expansion due to water intrusion is linked to the onset of cracking at each point, assuming that water enters the dam mostly through the cracks. Temperature and pore-water pressure effects are included using assumed distributions based on available field data. Construction joints are modelled using a frictional joint element, although a "constitutive alternative" is outlined. Close surveillance of the beha

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Author

M. Cervera; J. Oliver; E. Herrero; E. Oñate

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0013-7944)

Published

1990

Language

EN

Field

Engineering (Physical Sciences)